I took my Z9 + 400 f2.8E FL VR out today as I haven't used the 400 much lately. Man, I am so glad I did, the IQ from that lens is simply gorgeous.
White-faced Heron.
Z9 + 400 f2.8, 1/1250s f/3.2 at 400.0mm iso64
Osprey with fish. I got a whole series of 45 photos of it flying across the water and the Z9 stayed on the bird like glue and every one of them tack sharp. The Osprey had caught the fish further out but it was so big it couldn't fly out of the water and had to swim to a rock in order to get out of the water!
Z9 + 400 f2.8 + 1.4x TCIII, 1/1250s f/5.6 at 560.0mm iso180